Manufacture method for photovoltaic module

Abstract

The invention permits a plurality of strips of resin adhesive film having a desired width and unwound from a single feeding reel to be simultaneously pasted on a solar cell. For this purpose, the invention comprises the steps of: unwinding a resin adhesive film sheet from a reel on which the resin adhesive film sheet is wound; splitting the unwound resin adhesive film into two or more film strips in correspondence to lengths of wiring material to bond; pasting the strips of resin adhesive film on an electrode of the solar cell; and placing the individual lengths of wiring material on the electrode of the solar cell having the plural strips of resin adhesive film pasted thereon and thermally setting the resin adhesive film by heating so as to fix together the electrode of the solar cell and the wiring material.

1. A manufacture method for photovoltaic module, in which a wiring material is electrically connected to an electrode of a solar cell by using a resin adhesive film, comprising:
 unwinding the resin adhesive film from a reel on which the resin adhesive film is wound; 
 splitting the unwound resin adhesive film into two or more strips in correspondence to lengths of wiring material to bond; 
 pasting the strips of resin adhesive film on the electrode of the solar cell; and 
 placing the individual lengths of wiring material on the electrode of the solar cell having the two or more strips of resin adhesive film pasted thereon and thermally setting the resin adhesive film by heating so as to fix together the electrode of the solar cell and the wiring material. 
 
     
     
       2. The manufacture method for photovoltaic module according to  claim 1 , wherein the splitting step is to split the resin adhesive film into strips having a width not greater than that of the wiring material. 
     
     
       3. The manufacture method for photovoltaic module according to  claim 1 , wherein the splitting step employs a splitting cutter for splitting the resin adhesive film into strips of a predetermined width and a pressure roller for pressing the resin adhesive film against the splitting cutter, the splitting cutter splitting the resin adhesive film into strips in correspondence to the lengths of wiring material. 
     
     
       4. The manufacture method for photovoltaic module according to  claim 1 , employing:
 a first reel on which a resin adhesive film corresponding to an electrode on a front side of the solar cell is wound; and 
 a second reel on which a resin adhesive film corresponding to an electrode on a back side of the solar cell is wound, and further comprising: 
 unwinding the resin adhesive films from the first and second reels, respectively; and 
 splitting each of the unwound resin adhesive films into two or more strips in correspondence to the lengths of wiring material to bond. 
 
     
     
       5. The manufacture method for photovoltaic module according to  claim 1 , wherein a length adjustment mechanism is provided somewhere between a place of the splitting step and a place of the pasting step in order to ensure that all the strips of resin adhesive film move the same distance from a position of the reel to pasting positions on the solar cell. 
     
     
       6. The manufacture method for photovoltaic module according to  claim 5 , wherein the length adjustment mechanism increases traveling distance by bendingly guiding the resin adhesive film by a plurality of rollers on route from the splitting step to the pasting step. 
     
     
       7. The manufacture method for photovoltaic module according to  claim 5 , wherein the splitting step splits the resin adhesive film into three film strips which are separately guided to lateral side routes and a central route by guide rollers and the central strip of resin adhesive film is guided to the place of pasting step through the traveling distance increased by the length adjustment mechanism. 
     
     
       8. The manufacture method for photovoltaic module according to  claim 1 , wherein the resin adhesive film comprises an adhesive layer overlaid on a base material and a take-up device for taking up the base material is disposed downstream of the pasting positions on the solar cell.